Bandwidth enhancement in an injection-locked quantum dot laser operating at 1.31-&#956;m

N. A. Naderi; M. Pochet; V. Kovanis; L. F. Lester

doi:10.1117/12.842284

25 February 2010 Bandwidth enhancement in an injection-locked quantum dot laser operating at 1.31-μm

N. A. Naderi, M. Pochet, V. Kovanis, L. F. Lester

Proceedings Volume 7597, Physics and Simulation of Optoelectronic Devices XVIII; 759719 (2010) https://doi.org/10.1117/12.842284
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

The high-speed modulation characteristics of an injection-locked quantum dot Fabry-Perot (FP) semiconductor laser operating at 1310-nm under strong injection are investigated experimentally with a focus on the enhancement of the modulation bandwidth. The coupled system consists of a directly-modulated Quantum Dot (QD) slave injected-locked by a distributed feedback (DFB) laser as the master. At particular injection strengths and zero detuning cases, a unique modulation response is observed that differs from the typical modulation response observed in injection-locked systems. This unique response is characterized by a rapid low-frequency rise along with a slow high-frequency roll-off that enhances the 3-dB bandwidth of the injection-locked system at the expense of losing modulation efficiency of about 20 dB at frequencies below 1 GHz. Such behavior has been previously observed both experimentally and theoretically in the high-frequency response characteristic of an injection-locked system using an externally-modulated master; however, the results shown here differ in that the slave laser is directly-modulated. The benefit of the observed response is that it takes advantage of the enhancement of the resonance frequency achieved through injection-locking without experiencing the low frequency dip that significantly limits the useful bandwidth in the conventional injection-locked response. The second benefit of this unique response is the improvement in the high frequency roll-off that extends the bandwidth. Finally a 3-dB bandwidth improvement of greater than 8 times compared to the free-running slave laser has been achieved.

Citation Download Citation

N. A. Naderi, M. Pochet, V. Kovanis, and L. F. Lester "Bandwidth enhancement in an injection-locked quantum dot laser operating at 1.31-μm", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759719 (25 February 2010); https://doi.org/10.1117/12.842284

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available